Hillsborough, NJ Political Map | Democrat & Republican Areas in Hillsborough

By the BestNeighborhood data science team. Last updated May 2026.

Hillsborough leans slightly Democratic by roughly 8 points: about 54% of voters vote Democratic and 46% Republican.

 

About 83% of adults in Hillsborough typically vote, above the U.S. average of about 62%. Among adults in Hillsborough, ~45% vote Democratic, ~38% Republican, and ~17% don't vote. The map below shows estimated turnout by block group.

How Hillsborough compares

Among cities within 25 miles, Hillsborough leans more Democratic than 119 of 196 neighbors.

Politically, Hillsborough sits close to the rest of New Jersey.

Politics vary noticeably by neighborhood within Hillsborough. The north side runs the most Democratic (D+10) and the southwest side runs the most Republican (R+6), a spread of about 15 points.

Why Hillsborough leans the way it does

This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Hillsborough, not a ranked or complete list of what matters most.

Areas with high college attainment vote Democratic. About 63% of adults in Hillsborough hold a bachelor's degree, about 34 points above the U.S. average of 28%. Dense areas vote Democratic, and Hillsborough sits in the top fifth on density (about 65%, above 91% of cities).

Walkability and Democratic lean

Places with a highly walkable street grid tend to lean Democratic; Hillsborough, NJ sits in the top quarter nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.

Why turnout in Hillsborough looks the way it does

Areas with strong routine healthcare access turn out at higher rates. Hillsborough is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 72%, about 12 points above the U.S. average of 60%. High high-school completion lines up with higher turnout, and about 96% of adults in Hillsborough have completed high school, above 84% of cities. Learn more about the findings and methodology on the political spectrum map.

Sources and methodology

Precinct-level voting records used to fit the model come from New Jersey Division of Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.

Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.

Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.